Stencil and process of making the same



April 9, 1929- L. c. DOANE Lmsmm STENCIL AND PROCESS OF MAKING THE SAME Filed April 15, 1927 INVENTOR. LEROY C. DOANE M ATTORNEY Paterited Apr, 9, H329.

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LEROY C. DOANE, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE MILLER COMPANY, OF MERIDEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

STENCIL AND PROCESS OF MAKING THE SAME.

Application filed April 15,1927. Serial No. 184,020.

' The present invention relates to stencils and processes of making the same and is more particularly directed toward the art of preparing stencils for use in applying decorations to irregular objects.

According to the present invention, the stencil is preferably prepared by using as a form a frangible object of the same sizeand shape as the article with which the stencil is to be used. Where, for example, the stencil is to be used on a glass article such as a lamp globe, or shade, one may use one of these shades as a form for making the stencil. An article, such as a glass globe, or a plaster model, is first coated with conducting or metallic paint after which portions of the painted article are covered with a non-conducting resist, this resist being placed according to the design to be stencilled onto the article. The article is then placed in an electrolytic bath and copper, or other metal, deposited to produce a shell of substantial thickness. The copper will deposit on the conducting coating and not on the resist so that holes will be found corresponding to the design. After the shell has been completed one can break up the glass article or plaster model out from the inside of the shell leaving the metallic shell hollow and of the same size, shape and configuration as the article used'as a form.

The present invention contemplates the preparation of a stencil which will accurately fit irregular objects such as glassware, china, ornamental metal objects, and the like. The stencil contemplated by the present invention is made out of metal, such as copper, by electro-deposition on a base or form which is of the same shape as the article with which the stencil is to be used, and the stencil is provided with such an arrangement of holes suitableto produce the desired design on the objects or articles.

The use of such stencils in the decorative arts makes it possible to more economically apply identical designs in large quantities. The stencils are suitable for use in the decoration of such articles by painting, air brush etching, or electro-deposit, or otherwise.

The accompanying drawings show a typical method of preparing a stencil for a round object such as a lamp globe, together with the completed stencil for use on such an object, and a modified form of stencil for use with a substantially flat object. It is to be understood that these drawings are illustrative of the invention rather than limiting the same.

In these drawings:

Figure 1 is a sectional view with parts in so elevation showing an article of glassware, such as a lamp globe or shade, to which has been applied the metallic and non-metallic coatings above referred to.

Figure 2 is a similar view showing the object after the electro-deposit of the stencil;

Figure 3 is an elevational view with parts in section showing a completed stencil with reinforcements and hinging devices;

Figure 4 is an end view of the stencil of Figure 3;

Figure 5 is a fragmentary view illustrating a portion of the stencil applied to a portion of the object; and

Figures 6 and 7 illustrate a modified form. of stencil for use with a flat object such as a lamp base.

Figures 1 to 3, inclusive, illustrate the formation of a stencil for a round object such as a glass lamp globe 10. A coating of cop- 30 per paint or other. conducting material 1s applied to the outside of the glass article as indicated at 11. As here indicated the coating extends from the top to the bottom of the shade. After this paint has dried, non- 5 conducting resist is carefully applied to the metallic paints This'resist is indicated by the reference character 12, and, as here shown, it is applied in a band around the heel of the shade and in an ornamental scroll around the lower part of the shade. The painted globe or shade is then placed in the electrolytic bath, such as a copper plating solution, and copper is plated onto the outside of the object as indicated at 14. The metal is plated on until it will form a substantially thick rigid self-sustaining shell. Thiscopper shell "will have holes 15 corre- .sired, the shape of the holes may be changed by suitable tools while the stencil is still on the form, or other holes may be made.

A wire ring 20 is soldered about the upper end of the shell and a second wire ring 21 is soldered about the lower end of the shell 14.

Hinge members- 22 and 23 are then fastened to the shell; for example, by soldering, after which the glass form is broken away from the inside of the shell. The metal shell may then be cut into sections depending upon the shape and configuration of the article. Where the article is of the shape indicated in Figure 1, the shell may be cut into two sections 24 and 25 byv cutting it along the dot and dash line 26 of Figure 3. This will provide acompleted stencil which may be readily placed on other lass shades of the same shape. It will be rigid and self-sustaining and will accurately place the stencilled design on the desired place on the shade. The paint or other material to be applied to the shade may be passed through the holes in the stencil in any convenient manner. If desired, one can apply strips 27' along the joint between the portions of the stencil as indicated in Figure 5. These strips will pre- .vent the paint from passing through the sl1t between the portions of the stencil. One or more stencils may be made up for the article according to the intricacy of the design and the number of colors which are desired to be used in producing the design on the article. Q

Figures 6 and 7 illustrate a form of stencil which would be used on a flat object such as a lamp base. The lamp base is indicated diagrammatically at 30 as having a more or less fiat base portion of irregular outline onto which the design is to be applied. In makin up a stencil for such a structure, one woul first prepare a plaster cast of the same size and sh ape as the article with which the stencil is to be used. In some cases, the plaster model used in modelling the article will be found 'to be satisfactory for use in reparing the stencil. The plaster is painteifwith the metallic conducting paint and the nonmetallic resist in the same manner as the glass and then the shell such as illustrated at 31 is made by depositing copper or other metal onto the conducting paint. This shell will have the holes such as indicated at 32, corresponding to the design which is to appear on the lamp base. One half of such a stencil is illustrated in Figure 6. The stencil will be placed on the lamp base from above and may be removed in the same manner. It is therefore unnecessary to sectionalize the stencil as illustrated in Figure 3.

From the foregoing it will appear that the present invention provides an inexpensive and expeditious method of preparing stencils for use with irregular objects of more or less intricate design and in which the stencil may accurately conform to the size, shape and configuration of the article with which it is to be used. As these stencils are rigid and selfsustaining, they will not deteriorate in use, and can be stored safely. be formed about any frangible object and where the object to be stencilled is made of such material, one may use one of the objects as a form about which to make up one of the stencils. I

What is claimed is:

1. The method of preparing stencils which consists in plating metal onto a frangible form to form a shell, providing apertures in ghe shell and then destroying the frangible orm.

2. The method of preparing a stencil which consists in applying a conducting coat-i ing on a frangible form, applying a non-conducting resist on selected areas 'of the con-.

ducting coating, electroplating metal onto the exposed conducting coating, and breaking out the frangible form from the metal shell formed by the electroplating.

3. The method of preparing a stencil which consists in applying metallic paint on a frangible form, applying a non-conducting resist on selected areas of the metallic paint, electroplating metal onto the. ex osed metallic paint, and breaking out the rangible form from the metal shell formed by the electroplating.

4. The method of preparing a stencil which consists in applying copper paint on a frangible form, applying a non-conducting resist on selected areas of the copper paint, electroplating copper onto the exposed copper paint, breaking out the frangible form from the metal shell formed by the electroplating, and

cutting the shell into sections such that the sections may be applied to an object similar to the form.

5. The method of preparing a stencil which consists in applying a conducting coating on a frangible form, applying a non-conducting resist on selected areas of the conducting coating, electroplating metal onto the exposed conducting coating, reinforcing the shell formed by the electroplating, and then breaking out the frangible form from the metal shell.

6. The method of preparing a stencil which consists inapplyi'ng a conducting coating on a frangible form, applying a non-conducting resist on selected areas of the conducting coating, electroplating metal onto the exposed conducting coating, breaking out the frangible form from the metal shell formed bythe electroplating, and cutting the shell into sections such that the sections may be applied to The stencils may cle from the metal shell formed by the elecmoaoea i Q glass articles which consists in applying a tro lating, and cutting the shell into sections conducting coating on a glass article of the suc that the sections may be applied to the same form, applying a non-conducting resist glass articles. 10 on selected areas of the conducting coating, Signed at Meriden, in the county of New electroplating metal onto the exposed con- Haven and State of Connecticut, this 11th ducting coating, breaking out the glass artiday of April, 1927.

LEROY C. DUANE. 

